Engine Oil Pan

[dlfrisch]

I have a small oil leak so I am installing a new oil pan gasket and rear and front gaskets. I read some ware, maybe Les Andrews text....flip out the inner section of the oil pan and clean the lower section of oil sludge. How do you remove the snap in pan unit? I did not want to damage the pan or the edge of the base pan housing, so I used gunk and flushed it clean with the garden hose. ?????